Verifiable proof

Proof You Can Open in a Browser Tab

Working systems you can open right now, without talking to us. There are no client logos below and no testimonials — we will not publish proof we cannot substantiate. What we can put in front of you is software hjLabs.in built, deployed and keeps running in public. Open it, push on it, and judge the engineering yourself before you spend time on a call.

The retrieval half, live

Embeddings and extractive question answering you can test now

139open models
running live

Retrieval quality is decided by the embedding model and the reader on top of it. Both are open in your browser here, running on your own GPU through WebGPU with nothing uploaded. Try your own passage and your own question, and see how a given model behaves on your actual text before anyone builds a pipeline around it.

EmbeddingsQuestion answeringAll 139 models
The generation half, live

Chat with open models on your own hardware

139open models
running live

The generation step of a RAG system, running client-side: an open model loads into your browser and executes on your GPU via WebGPU. Useful for the question every RAG buyer should ask early — how small a model can we get away with before answer quality drops on our documents.

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Why hjLabs.in — stated plainly

We are a small specialist team, not a large consultancy, and we are not going to dress up as one. Here is what that actually buys you.

You talk to the engineer who builds it

There is no account-manager layer between you and the person writing the code. The engineer who takes your scoping call is the engineer on your project, and stays reachable for the length of it.

Industrial hardware is our background, not a slide

hjLabs.in designs, manufactures and sells production machines — CNC routing, selective soldering, wire cutting, spring coiling, transformer winding. When a vision model has to survive a real factory line, cameras, lighting, PLCs and vibration are our day job, not a subcontractor’s.

Our work is inspectable before you pay us

Live tools you can open, open-source repositories you can read, and a standards implementation you can check line by line against the DICOM specification. You do not have to take a claim on trust when you can go and test it.

What we are not going to show you: client logos, testimonials or case-study numbers. We will not publish proof we cannot substantiate, and we would rather you find that out on this page than after signing something. For a focused engagement, the trade is straightforward — less brand-name comfort, more of the senior engineering time you are paying for.
Book a 30-minute technical call

What is RAG?

Retrieval-Augmented Generation (RAG) combines the power of large language models with your proprietary data to provide accurate, contextual answers. Unlike standard chatbots that can hallucinate, RAG systems:

  • check_circle Retrieve Real Data - Pull relevant information from your documents in real-time
  • check_circle Reduce Hallucinations - Ground responses in factual company data
  • check_circle Stay Current - Always use your latest documentation and policies
  • check_circle Cite Sources - Provide references to original documents
  • check_circle Work with Your Data - No need to retrain expensive models

How RAG Works

1
Indexing

Documents are chunked, embedded, and stored in vector databases

2
Retrieval

User query finds most relevant document chunks via semantic search

3
Generation

LLM generates answer using retrieved context as grounding

4
Response

User gets accurate answer with source citations

Our RAG Services

End-to-end RAG implementation for every scale

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Enterprise Knowledge Bases

Convert internal wikis, documentation, policies, and procedures into searchable AI-powered knowledge systems.

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Customer-Facing RAG Chatbots

Build intelligent chatbots that answer customer questions using your product docs, FAQs, and support articles.

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Hybrid Search Implementation

Combine semantic search with keyword search and knowledge graphs for maximum retrieval accuracy.

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Vector Database Setup

Implementation and optimization of Pinecone, Weaviate, Qdrant, Chroma, or other vector databases.

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Multimodal RAG

Search and retrieve across text, images, audio, and video content for comprehensive knowledge access.

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RAG Optimization

Fine-tune chunking strategies, embeddings, retrieval accuracy, and reduce hallucinations in existing systems.

RAG Use Cases

Real-world applications with measurable ROI

📋 Internal Knowledge Management

Let employees ask questions and get instant answers from company documentation, HR policies, and procedures.

ROI: 70% less time searching

🏆 Customer Support Automation

Automate Tier-1 support with chatbots that access product manuals, troubleshooting guides, and FAQs.

ROI: 60% fewer support tickets

⚖️ Legal Document Analysis

Search through contracts, case law, and regulations to find relevant precedents and clauses instantly.

ROI: 80% faster legal research

🩺 Medical Knowledge Systems

Help healthcare professionals access patient records, clinical guidelines, and research papers quickly.

ROI: Improved patient care quality

💹 Financial Analysis

Query annual reports, earnings calls, market research, and financial statements for investment insights.

ROI: Faster decision making

🛒 E-commerce Product Search

Semantic product search that understands natural language queries and finds relevant products accurately.

ROI: 40% higher conversions

Technology Stack

Best-in-class tools for every RAG layer

Vector Databases

Pinecone, Weaviate, Qdrant, Chroma, FAISS, Milvus

Embeddings

OpenAI, Cohere, Hugging Face, Sentence Transformers

LLM Frameworks

LangChain, LlamaIndex, Haystack, Semantic Kernel

Cloud Platforms

AWS Bedrock, Azure OpenAI, Google Vertex AI

RAG vs Fine-Tuning: When to Use What?

Choose the right approach - or combine both

✅ Choose RAG When:

  • Your data changes frequently
  • You need to cite sources
  • You want lower costs (no retraining)
  • You need real-time information
  • You have large document repositories
  • Transparency is important

🧠 Choose Fine-Tuning When:

  • You need domain-specific language/style
  • Your knowledge is static
  • You want faster inference
  • You need specific output formats
  • You have labelled training data
  • Budget allows for retraining

✨ Best approach: Hybrid! Use RAG for knowledge retrieval + Fine-tuned model for domain expertise

Further Reading

Deeper technical write-ups from our engineering team:

RAG Implementation Packages

Flexible packages for every stage of your RAG journey

View prices in:

Discovery Sprint

$5,000–$10,000

Senior specialists. Transparent scope.

  • Single source integration
  • Vector DB setup
  • Basic retrieval
  • Simple chatbot UI
  • 3 months support
Get Started

Production RAG

⭐ Most Popular
$18,000–$40,000

Senior specialists. Transparent scope.

  • Multiple data sources
  • Hybrid search
  • Advanced retrieval
  • User authentication
  • Analytics dashboard
  • 6 months support
Get Started

Enterprise RAG

$45,000–$100,000

Senior specialists. Transparent scope.

  • Text + Image + Audio
  • Video understanding
  • Advanced embeddings
  • Multi-format search
  • 12 months support
Get Started

RAG Consulting

$800/day

Senior specialist. Fixed agenda.

  • Architecture review
  • Vector DB selection
  • Performance tuning
  • Best practices
  • Team training
Get Started

"Fantastic AI engineer with pragmatic business and technical skills. Great to work with. An asset to any team."

Andy Curtis CISO, CibrAI — managed Hemang directly View Case Study →
Industries We Serve

RAG Systems Across Every Industry

RAG transforms how industries work with information. Here's how hjLabs.in deploys RAG to deliver measurable ROI.

⚕️
Healthcare

AI that answers clinical questions from patient records, medical literature, and treatment protocols — without hallucinating drug interactions.

  • ✅ 90% reduction in nurse documentation time
  • ✅ AI answers grounded in cited sources
  • ✅ HIPAA-compliant RAG deployment
⚖️
Legal & Compliance

Instantly search thousands of case files, contracts, and regulations. AI answers cite the exact clause — billable hours cut by 40%.

  • ✅ Contract review in minutes, not hours
  • ✅ Compliance gap detection automated
  • ✅ Answers with source citations always
🏦
Banking & Finance

Analysts query annual reports, filings, and market research in seconds. RAG delivers accurate answers from proprietary financial data.

  • ✅ 5x faster financial research
  • ✅ RBI/SEBI compliance knowledge base
  • ✅ Audit-ready answer traceability
🛒
E-Commerce & Retail

AI customer support that answers product questions from your catalog, manuals, and policies — reducing support tickets by 70%.

  • ✅ 70% fewer Tier-1 support tickets
  • ✅ Product catalog Q&A at scale
  • ✅ Returns & policy handling automated
🏭
Manufacturing

Technicians query machine manuals, SOPs, and maintenance logs via voice or chat — reducing downtime and training time dramatically.

  • ✅ 60% faster fault diagnosis
  • ✅ Maintenance SOP retrieval instant
  • ✅ Onboarding time cut by 50%
🎓
Education & EdTech

AI tutors and research assistants built on institutional content — textbooks, lecture notes, and past papers — for personalized learning at scale.

  • ✅ Personalized study Q&A 24/7
  • ✅ Faculty research assistant built-in
  • ✅ Accreditation document management

RAG vs Fine-tuning: When to Use Which

A side-by-side decision guide. Most production systems end up using both — see our LLM fine-tuning service for hybrid stacks.

Dimension RAG Fine-tuning
When data changes often ✅ Re-index in minutes ❌ Requires retraining
Latency budget 300–1500 ms (retrieval + LLM) ✅ 100–500 ms (model only)
Initial cost ✅ Low ($4k–$45k) High ($30k–$200k+ + GPUs)
Per-query cost Higher (longer prompts) ✅ Lower (shorter prompts)
Hallucination control ✅ Strong (grounded + cited) Moderate (style only)
Best for Knowledge bases, doc QA, agentic tools Tone, format, classification, structured output

Not sure which fits? Our team can scope a hybrid architecture — see all AI/ML services or book a free consultation.

Tech Stack We Use for RAG

Battle-tested tools, picked per project. We are stack-agnostic — we choose what fits your latency, scale, and compliance constraints.

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Orchestration Frameworks

LangChain and LlamaIndex for retrieval graphs, prompt routing, and agentic tool calls. Haystack for hybrid pipelines where on-prem deployment matters.

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Vector Databases

Pinecone for managed cloud, Weaviate for hybrid keyword+vector, Qdrant for self-hosted Rust speed, pgvector when you already run Postgres. Milvus for billion-scale.

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Embedding Models

OpenAI text-embedding-3-large for general use, Cohere embed-v3 for multilingual, BGE and E5 for self-hosted, Voyage for code and long documents.

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Rerankers

Cohere Rerank 3 and Voyage rerank-2 to lift precision@k by 15–30%. We benchmark cross-encoder rerankers against your eval set before shipping.

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Evaluation

Ragas for faithfulness, relevance, and context metrics. TruLens for groundedness scoring. Custom golden datasets with 50–500 labeled Q&A pairs run in nightly CI.

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Observability

LangSmith for trace-level debugging, Arize Phoenix for production drift, Langfuse for self-hosted analytics. Every retrieval call is logged with citations and latency.

Frequently Asked Questions

Pricing, fine-tuning trade-offs, evaluation — the questions clients ask most.

RAG (Retrieval Augmented Generation) combines a vector database with an LLM to answer questions using your documents. It reduces hallucinations by 90% compared to bare LLMs and grounds responses in your actual data.

A basic RAG system takes 2–4 weeks. A production-ready system with hybrid search, reranking, and monitoring takes 6–12 weeks depending on data complexity and integration requirements.

hjLabs.in RAG systems can process PDFs, Word documents, Excel, CSVs, web pages, databases, and any text-based data source. We support multi-modal RAG for images and tables too.

RAG system development is priced in three transparent tiers. Pilot RAG: $4,000–$8,000 over 3 weeks for a single corpus, hybrid search baseline, and an evaluation suite. Production RAG: $20,000–$45,000 over 6–10 weeks, including multi-source ingest, query rewriting, citation UI, and monitoring. Enterprise RAG Platform: $80,000–$180,000 over 3–5 months, with multi-tenant architecture, RBAC, observability, and on-prem deployment options. Custom scopes available on request.

RAG injects your data into the LLM's context window at query time by retrieving relevant chunks from a vector database. Fine-tuning instead bakes knowledge directly into the model weights through additional training. RAG wins when your data changes often, you need source citations, your initial budget is limited, and you want to control hallucinations with grounded context. Fine-tuning wins when you need a specific writing style, a custom output format, lower per-query latency, or domain-specific reasoning that pure retrieval cannot teach. Most production systems combine both: a fine-tuned model for tone and structure, and RAG for current factual knowledge. See our LLM fine-tuning service for hybrid stacks.

We evaluate RAG systems with the open-source Ragas framework alongside TruLens and LangSmith. The four core metrics are: faithfulness (does the answer stick to retrieved context, no hallucinations), answer relevance (does it actually address the question), context precision (are top-ranked chunks truly relevant), and context recall (did we retrieve all the information needed). We build a labeled eval set of 50–500 question–answer pairs from real user queries, run nightly regressions in CI, and track drift over time. Production observability via Langfuse or Arize captures live traces for ongoing tuning.

Ready to Build Your RAG System?

Transform your documents into intelligent, searchable knowledge with RAG technology.

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